At installation use on one axis of the car of a spring with identical technical characteristics (with identical color marking).

Examine the case and a rod of the shock-absorber. On the case there should not be mechanical damages, on a rod — corrosion traces. Install the shock-absorber in vertical position and check its work, moving a rod at full capacity, and also up and down on 50–100 mm. In all cases the rod of the shock-absorber has to move smoothly, with a notable resistance. If the rod of the shock-absorber moves breakthroughs or there are mechanical damages, replace the shock-absorber.

The rod of the gas-filled shock-absorber can spontaneously move forward from the shock-absorber. Lack of spontaneous promotion of a rod from the shock-absorber does not testify to malfunction of the shock-absorber. In this case the gas-filled shock-absorber continues to work as the hydraulic shock-absorber. The shock-absorber performs the functions and in the absence of the excessive pressure of gas, but at the same time additional noise when moving the piston can appear.

Check lack of leak of damping liquid. Small dribble of oil at preservation of normal operability of the shock-absorber is allowed. If the spot of the liquid which flowed out from the shock-absorber extends only to the lower support of a spring, then it is considered the normal phenomenon. At insignificant dribble of liquid from the shock-absorber the sealing ring of a rod of the shock-absorber is greased that increases the term of its service.